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Have you tried pressing your computers On/Off button when it is 'asleep'?
–
Stefano Palazzo♦Nov 21 '10 at 14:37

After power on from suspend, did you wait a little longer than usual? Wake up from suspend to disk may take minutes on some systems.
–
TakkatNov 21 '10 at 15:05

5 Answers
5

You can configure the laptop not to suspend when you close the lid using the power management tools from the menu:

System > Preferences > Power Management

If your laptop has an nVidia graphics card, it may be the open source graphics driver causing the problem. The open source graphics driver has some power management issues on some laptops. Try switching to the closed source drivers with the Hardware drivers tool from the menu: